نتایج جستجو برای: orchid

تعداد نتایج: 2578  

2017
Hans Jacquemyn Michael Waud Rein Brys Félix Lallemand Pierre-Emmanuel Courty Alicja Robionek Marc-André Selosse

Two distinct nutritional syndromes have been described in temperate green orchids. Most orchids form mycorrhizas with rhizoctonia fungi and are considered autotrophic. Some orchids, however, associate with fungi that simultaneously form ectomycorrhizas with surrounding trees and derive their carbon from these fungi. This evolutionarily derived condition has been called mixotrophy or partial myc...

2013
Axel-Cyrille Ngonga Ngomo

The discovery of links between resources within knowledge bases is of crucial importance to realize the vision of the Semantic Web. Addressing this task is especially challenging when dealing with geo-spatial datasets due to their sheer size and the potential complexity of single geo-spatial objects. Yet, so far, little attention has been paid to the characteristics of geo-spatial data within t...

Journal: :Annals of botany 2009
Melanie Roy Takahiro Yagame Masahide Yamato Koji Iwase Christine Heinz Antonella Faccio Paola Bonfante Marc-Andre Selosse

BACKGROUND AND AIMS Epipogium aphyllum is a Eurasian achlorophyllous, mycoheterotrophic forest orchid. Due to its rarity, it is often protected, and its biology is poorly known. The identity and pattern of colonization of fungal associates providing carbon to this orchid have not been studied previously. METHODS Using samples from 34 individuals from 18 populations in Japan, Russia and France...

2013
Abishkar Subedi Bimal Kunwar Young Choi Yuntao Dai Tinde van Andel Ram P Chaudhary Hugo J de Boer Barbara Gravendeel

BACKGROUND Wild orchids are illegally harvested and traded in Nepal for use in local traditional medicine, horticulture, and international trade. This study aims to: 1) identify the diversity of species of wild orchids in trade in Nepal; 2) study the chain of commercialization from collector to client and/or export; 3) map traditional knowledge and medicinal use of orchids; and 4) integrate the...

2014
Rui Ding Xu-Hui Chen Li-Jun Zhang Xiao-Dan Yu Bo Qu Ru Duan Yu-Feng Xu

Mycorrhizal association is known to be important to orchid species, and a complete understanding of the fungi that form mycorrhizas is required for orchid ecology and conservation. Liparis japonica (Orchidaceae) is a widespread terrestrial photosynthetic orchid in Northeast China. Previously, we found the genetic diversity of this species has been reduced recent years due to habitat destruction...

2013
Ming-Hsien Hsieh Zhao-Jun Pan Pei-Han Lai Hsiang-Chia Lu Hsin-Hung Yeh Chia-Chi Hsu Wan-Lin Wu Mei-Chu Chung Shyh-Shyan Wang Wen-Huei Chen Hong-Hwa Chen

Orchidaceae, one of the largest angiosperm families, has significant commercial value. Isolation of genes involved in orchid floral development and morphogenesis, scent production, and colouration will advance knowledge of orchid flower formation and facilitate breeding new varieties to increase the commercial value. With high-throughput virus-induced gene silencing (VIGS), this study identifie...

Journal: :Plant physiology 1998
A Q Bui S D O'Neill

The temporal and spatial expression patterns of three 1-aminocyclopropane-1-carboxylate (ACC) synthase genes were investigated in pollinated orchid (Phalaenopsis spp.) flowers. Pollination signals initiate a cascade of development events in multiple floral organs, including the induction of ethylene biosynthesis, which coordinates several postpollination developmental responses. The initiation ...

Journal: :The New phytologist 2017
Valeria Fochi Walter Chitarra Annegret Kohler Samuele Voyron Vasanth R Singan Erika A Lindquist Kerrie W Barry Mariangela Girlanda Igor V Grigoriev Francis Martin Raffaella Balestrini Silvia Perotto

Orchids are highly dependent on their mycorrhizal fungal partners for nutrient supply, especially during early developmental stages. In addition to organic carbon, nitrogen (N) is probably a major nutrient transferred to the plant because orchid tissues are highly N-enriched. We know almost nothing about the N form preferentially transferred to the plant or about the key molecular determinants ...

2017
Marta Kolanowska Elżbieta Grochocka Kamil Konowalik

In the present study we investigate the concept of phylogenetic niche conservatism (PNC) within the American species of angraecoid orchids (Campylocentrum and Dendrophylax) and their closest relatives in the Old World (Angraecum) using ecological niche modelling (ENM). The predicted niche occupancy profiles were matched with the outcomes of previous phylogenetic studies to reconstruct the evolu...

Journal: :Revista de biologia tropical 2006
Ingemar Hedström Jessica Harris Kimberly Fergus

In order to understand the implications of agriculture on the environment, ecosystem health must be measured. Observing the presence of a biological indicator within an ecosystem is one such method. In this study, male euglossine bees were observed using as attractant cineole 1:8, at adjacent organic (La Paz) and conventional (La Carena) coffee farms near the Northern Barranca River, San Ramón,...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید